GCSE Combined Science (Biology) Paper 2, Nov 2021, evaluates foundational biological concepts such as ecosystems, cellular processes, human genetics, pathogens, and natural selection. Topics covered include biotic and abiotic factors, selective breeding, chromosomal inheritance, disease prevention, and the impact of environmental variables on species distribution. The paper emphasizes applied knowledge through data interpretation, graph analysis, and hypothesis testing. Questions explore ecological relationships, water and carbon cycles, genetic probabilities, and the theory of natural selection, focusing on scientific literacy and critical thinking.